Gizmo making is urgent, urgent, urgent

Go buy a model, take it apart yourself, and build a shell by yourself....Cope.

You're good enough to read to me, trolls crawl.

Submarine: Get an empty bottle, tie some small bottles in the West Week, pierce some small holes on each small bottle (not too many are enough), then seal the mouth of the big bottle, insert a straw, and then put it in the water, it will sink slowly, and blow on the straw if it rises. It is known as the "Principle of Submarines" exhibit.

Homemade flashlight.

The specific method of making it is to remove one end of the lid of a waste can (such as a Lulu beverage can) and knock the other end with a round hammer. Roll up two No. 1 batteries with thick corrugated cardboard and put them into the tank with the positive electrode facing up and the negative electrode facing down.

Find a suitable plastic lid (such as a magic big roll lid that can be fastened to Lulu cans) and dig a small circular hole in the lid** in such a size that the bulb is plugged in tightly. Insert the base of the bulb into the small hole. Take a piece of wire hunt and peel off the wire skin at both ends, wrap one end around the lamp base, and pierce a small hole through the side of the plastic cover with the other end.

Place the plastic lid over the can. Check that the bulb and battery are in close contact. At this point, the Clan-destroying Flashlight is ready.

When using, use your thumb to press the wire from the sidewall on the weld that is not painted from the can, the flashlight will glow, and the thumb will jump off the wire, and the flashlight will go out, which is very convenient to use.

Homemade hot water powered boat, make a hull with aluminum leather (10cm long can be changed according to the actual situation), if it is too troublesome, it can be made of other materials, but it must be resistant to high temperatures, and you will know the reason later. Then use a thin copper pipe (about 5mm, you can use the refrigerator, you can go to the scrap collection station to buy a section, 20cm, you can change with the actual situation); The middle part of the copper pipe is coiled into a spiral shape, and then a cool oil box is placed in the middle of the ship, a hole is drilled in the bow and stern, connected to the two ends of the copper pipe, sealed with 101 fast adhesive, the whole ship is made, test machine: add some alcohol to the cool oil box, put the boat into the water after ignition, and the water enters the copper pipe and flows out after being heated at the spiral, that is, the thrust is generated, I have seen it on a ** before, and now I can't find it, otherwise there is no need to write so much, ** is clear and simple, absolutely successful!

Hehe!!

I don't know what type of ??? you're going to do

The public bai who will fight

Chicken This is a simple toy tool made of the principle of magnetism.

Supplies needed: small iron dao tablets, inside.

Cardstock, scissors, a container of bar magnets, glass plates (or thick cardboard) production method:

1. Draw two roosters on cardstock and cut them out with scissors.

2. Cut two small pieces of iron and bend them into an arc-shaped pry plate, and fix the rooster on the arc-shaped pry board.

3. Find a bar magnet, put the rooster on the glass plate (or thick cardboard), slide the magnet left and right, due to the effect of magnetism, the rooster will fight.

It is advantageous to make small inventions in energy conservation and emission reduction, such as innovations in wind and solar energy.

Material: One empty can.

Pull the neck of the can open with a knife and don't throw it away. Put the shuttlecock in it, close it with the mouth of the bottle, and it's done. Mom and Dad, please do it too!